[German]In Windows 10 there seems to be a display issue in dual-screen mode, in both version 1803 and 1809. Users complain about a white or black bar at the top of the screen.
The problem description
I came across this German Microsoft Answers forum post some time ago where a user describes the problem for Windows 10 version 1803 as follows.
I have the following phenomenon with 2 customers (both 2-screen operation):
On one (!) screen you can see a white bar at the upper edge, several centimeters high, running over the complete screen (with the 2nd customer partly also black).
The screenshot comes from a remote maintenance session, which means that I see it there too. It can even be seen in the small picture of the preview in the taskbar.
Everything below [the white bar in the upper corner of the right screen] cannot be clicked either. If you drag a window over from the "normal" monitor, it looks quite normal. This only seems to affect windows that have been opened directly on this monitor. It also doesn't always happen.
Could have been considered an isolated case where a graphics driver or misconfiguration caused the problem. But within this thread several users confirmed that report, all of them affected in dual monitor mode. The latest reports dates from March 2019 and refers to Windows 10 V1809. One affected person writes that the display error only occurs 1-2 times a day – then you could fix it by restarting.
I did some research on the web before I posted this blog post. This English-language MS Answers forum post from June 2018 describes a similar problem, but only with a screen. In this post and here a white line appears above apps. In this post someone blames the Electron framework. And here such a white bar for the Explorer is described. But I'm not sure if these are other scenarios.
Workarounds for the issue
Currently, two possible workarounds are described by the affected persons, with which the display error can be eliminated without a restart.
- Set the display of the screen briefly to 125% by zoom and then go back to 100%.
- You can press the Windows+P key combination to switch off the second screen. After that you go back to dual-monitor mode.
I don't know of any solution to this problem – updating the graphics driver didn't help those affected. Any of you affected? And if so, is there a known solution?
Addendum: I've escalated this issue via the German Microsoft Answers forum to all Microsoft forum moderators, but no reaction or a fix.
Addendum 2: Two workarounds
German blog readers pointed out two workaround that seems to have helped in some cases.
- Workaround 1: Check, if an updated graphics driver ist available and install it. After a restart, check, if the issue is gone.
- Workaround 2: Check if the monitor frequency is set to 60 Hz, and if yes, change ist to 59 Hz. That helped in one case.
To those affected, the question of whether any of these two approaches have helped?
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